Electrical pull-socket.



E. H. FREEMAN. ELECTRICAL PULL SOCKET.

APPLICATION FILED JUNEZ, 1911.

l1,009,401 PaLented Nov. 21, 1911.

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i u ls* i 'UNITED ,STATES PATENT. OFFICE EDGAR E. ,EEEEMAN, 0E'.iEEi-rroiv, NEW JERSEY, AssiGNoE '.roE.y H. EEEEMAE- ELE; mmc commi-E TEEN'ronNEw JERSEY, A coEromTIoN oE-'NEW JEEsEY.

EEEcfrEHI'cAE ruLLsocKE'r.

To all 'may i Y Be it known'that I, EDGAR I-I. F EMAN,

a citizen of the United States, residing at Trenton, in the county ofr Mercer and State of New Jersey, have invented certain new and useful Improvements in Electrical Pull- ;Sockets, of which. the following is a speciication.

.- novel constructionof pull switch which en- ,This invention relates to the subject of electrical pull sockets for electric incandescent lamps, wherein a pull chain or equivalent flexible pull connection is employed for operatinglthe socketswitch to make and vbreak the electricalcircuit through the lamp.

To this end the invention contemplates a tirely dispensesl with the ratchet-commutator so commonly employed', and which commutato;` involves the idea of ratchet in- .clines either on the porcelain of the socket.

body or on a rotating member, said inclines ultimately presenting. metal contact faces and insulating faces that provide for the make and break of the circuit. In place thereof, the present invention proposes toutilize a pull switch employing a rotary rectangular switch block, having a snapping acn Vtion to ecure aj-quick break of the circuit,

in combination with a simple formof ratchet operating mechanism, and an' insulator between the two, which insulator is utilized to transmit motion to the-'switchparts while at the same time thoroughly insulating the switch proper from the pull chain operating mechanism. I Besides the improved con-A struction is of such av character as to admit of direct metallic connection between the pull chain and the pull lever of the operat ing mechanism. p I

`A',special object `of the invention is to provide anovel and practicalxconstruction of switch block in vcombination with the insulator between the same and the operating mechanism and also to provide a novel form Y the switch block that secures ease, certainty and arrangement of snapping 'spring for and reliability of operation. y

I donot confine myself,v in carrying out the above objects, tothe precise details of construction of the various-parts of the socket, but a preferred and practical embodiment` is shown in thef accompanying drawings,.in which,

- Figure l is a longitudinal sectional view of a pull socket involving the present inp l speciea'tiqn of Letters Patent. Patented NOV, 21,1911, "application mea :une 2, 1911. srieiNo. 630,952. v

`vention. FigbQ is'` a vcross-sectionalview thereof on the line 242 of Fig.` 1,-showing 4in elevation thepull'lever operating mechanism for the switch. Fig.'l 3 is' a sectional view on the line 2-2of Fig'. l, omitting thesocket casingIand the pull leveroperat' ing mechanism, andshowing by full and dotted lines the off and on;po'sitions of the switch block;` Fig. e is an inside .plan view orv elevation of the .upper insulating block of the socket body. Fig. 5 is a detail sectional View showing `one of the wire terminal connections with' the'screw shell of the socket. Fig. 6 is a detail in per-'- spective of the rotatable switch vblocki and the insulator disk connected therewithf., Fig. 7 isa sectional-vewof the part shown in Fig.6. Fig.. 8'is a detail in'perspective of the long snapper spring for the; switch block of the switch proper. f y l j y Like references designate corresponding parts in the several-figures ofthe, drawings. .A pull socket, constructed in 'accordance with the present' invention, 4includesin lits organization the usual exter`nal" socketfcas ing Q, the interior insulator socket body, the socketswitch, andthe switch opera-.ting

mechanism., YIn thepresent invention the particular construction ofthe' socket insulat- 1 ing body is unimportantexceptzfor the provision of housing the switch and insulating it from the'operating mechanismand theiwire terminals, Hence for illustrative purposes there is shown in thedrawings asocket body consisting of two suitably connected blocksv A and B of porcelain or equivalent insulating material. The socket switch ymay be conveniently located within a housing chamber insulating blocks, which maygbev the lower block B shown in .the'drawinga and, as above indicated, isintendedgto be completely insulated from its operating mechanism and v1 recessed into the inner side Aof one of the from the terminal plates 'to whicli the'wil.e

ends are connected. z

rlhe switch proper, arranged withinthe housing chamber 1, essentially consists of a contact spring 2,. a rotary switch block 3,'

and a snapper springe for snappinghthe`` block in a direction for effecting a quick break of the circuit, and also for assisting inholding the switchv block in both positions.- j n t The rotary switch block` consists of'a rectangular body, preferablyiof 'insulating` v rotatable insulator disk 7, which is suitably fastened to the block 3, or may be formed integral therewith, according to manufacturing requirements. The rotatable switch block 3 is loosely mounted upon a center stationary supporting spindle 8 which extends centrally through the insulating socketblocks of the socket body and preferably has associated with one threaded terminal 9 thereof a tension device 10 for the retracting spring 11 which is operatively connected with the .oscillating ratchet member 12 carried with and by the swinging pull'lever 13, to the outer end of which pull lever is suitably connected, as at 14, one end of the pull chain 15, working through the pull chain guide 16, arranged in a convenientl place for guiding the chain in its movements in and out of the socket casing. TheleVer ratchet member 12 is loosely hinged on the stationarycenter spindle 8 and is yieldingly held in operative relation `to a rotating ratchet member or disk 17, which is suitably fastened upon one side of the insulator disk 7, the latter therefore acting as an intermediate coupling and insulator between the pull lever operating mechanism and the rtary switch block 3 of the pull switch, it

being observed that the several assembled elements 3, 5, 6, 7 and 17 are preferably secured together by the common fastenings 17a which fastenings are rivets or equivalent devices.

As above indicated, the rotary rectangular switch block 3 coperates with the contact spring and the chamber 1. This con` tact spring is preferably of a double form, the free arm of which is engaged by the block 3 and the other arm of which is connected with an attaching plate 18 engaged by the combined fastening and conducting screw 19 whichextends through the lower insulating block 3 and also serves to hold in place the center yspring contact spring 20 which is disposed within the bottom portion of the screw contact shell 21 of the socket. i

The snapper spring 4 for the rectangular switch block 3 is spec1ally designed and is of practical importance. This spring is of eX- tra length and is arranged parallely to ther axis or spindle 8 for the switch block. The said spring consists of a single piece of spring metal looped into an approximate, U-

i form and lying in a chamber formed by the separate recesses 22 and 22a in the inner side A preferable construction is shown fastening means.

of the insulating blocks A and B. One leg 23 ofthe said spring extends about one edge of the lower block B and is formed with a securing foot or flange 24 held to the said block by a fastening screw 25 or equivalent The other leg 231 of the spring 4 is free to yield and is formed at its terminal with a flat bearing plate or. head 26 that is heldunder spring pressure against the rotatable switch block 3,. The pressure of this bearing plate 26 is exerted in line with the center of the axis of the switch block so that at each quartier turn of the block the said plate 2G acts as a detent therefor, while the ratchet operating mechanism is resuming a fresh starting position. At the same time, as an end of the block 3 commences to pass off of the springs 2 and 3, the latter springtakes up the movement and quickly snaps the block around tothe full line position shown in Fig. 3', thus securing the quick break.

One of the wire terminal plates 27 is tted to the insulating block B and has a metallic conducting plate connection 28 with the snapper sprin 4. The other wire terminal plate 29 is eld in place by the combined fastening and conducting screw 30, which also connects with the screw shell contact 21. r

The details of the mounting and guiding of the pull lever and its chain are unimportant to the present case, since said details are fully disclosed inland covered by my related application filed Jan; 28, 1911, Serial No. 605,208.

I claim 1. A pull socket comprising a body, a snap switch including a rotary switch block, snapping means for the block, an insulator disk pull chain operating means including a ratchet member arranged upon one side of said. insulator disk, a metallic contact sheath incasing the switch block and held clamped between the latter and the insulator disk, and fastening means for holding the switch block, the insulator disk and said ratchet memberV in assembled relation.

2. A pull socket comprising a body, a snap switch including a rotary insulating switch block, snapping means for the block, an insulator disk, pull chain 4operating means including a ratchet element arranged at one side'of the disk,-a metallic' sheath incasing the switch block and having a flange held between the block and the insulator disk, and common fastening devices extending through the switch block, the insulator disk, and the ratchet block.

' 3. A pull socket comprising a body, a snap switch including a rotary rectangular switch block, and a snapper spring consisting of a doubled spring plate housed within the switch body and exposed longitudinally thereof parallel with the axis ofthe block,

one/leg of said plate having a fastening connection with the body and the other leg hav- Y doubled snapper spring, the latter having atits free terminal a bearing plate` for ening at its free terminal a ilat bearing plate l engaging the switch block laterally.

4. A pull socket comprising a body, a snap switch including a doubled contact spring, a rotary rectangular switch block, and a Copies of this patent may be obtained for ve cents each, by addressing Washington, D. C.

contact having electrical connection with.

'said contact spring, a wire terminal having' l5 electrical connections with the' snapper y spring, the screw shell contact, and a wire terminal plate having electrical connection with the screw shell contact.

In testimony whereof I hereunto aix myi i signature in the presence of two witnesses.

EDGAR H. FREEMAN.

" Witnesses:

MARY .S. CURTIS, Amara A. HENRY.

the "Commissioner of Patents 

